API's RRB Receiver interfaces with shipborne I Band surveillance / navigation radars. The RRB Receiver (which is specifically tuned to the transmit frequency of the associated RF2M Microwave Ltd I Band Transponder) takes a signal from the prime radar antenna feed waveguide.
The processed output from the RRB Receiver is available for display on bridge or command centre radar display system(s). Additional RRB Receiver outputs may be used for further signal processing or track extraction etc. As standard, the output from the RRB Receiver shows the code being transmitted by the Transponder. 16 different codes are selectable in the aircraft cockpit for identification or other purposes.